(i) Name the physical quantity which is measured in calories.
(ii) How is calorie related to the S.I. unit of that quantity ?
0.5 kg of lemon squash at 30° C is placed in a refrigerator which can remove heat at an average
rate of `30 J s^-1`. How long will it take to cool the lemon squash to 5°C? Specific heat capacity of
squash = `4200 J kg^-1K^-1`
An electric heater of power 600 W raises the temperature of 4.0 kg of a liquid from 10.0 ℃ to
15.0 ℃ I 100 s. Calculate: (i) the heat capacity of 4.0 kg of liquid, (ii) the specific heat capacity
of the liquid.
Calculate the amount of heat energy required to raise the temperature of 100 g of copper from 20°C to 70°C. specific heat capacity of copper = `390 J kg^-1 K^-1`.
(a) Calculate the heat capacity of a copper vessel of mass 150g if the specific heat capacity of copper is `410 J kg^-1 K^-1`
(b) How much heat energy will be required to increase the temperature of the vessel in part (a) from 25°C to 35°C?
1.0 kg of water is container in a 1.25 kW kettle Calculate the time taken for the temperature of water to rise from 25° C to its boiling point 100°C. Specific heat capacity of water = ` 4.2 J
In an experiment, 17g of ice is used to bring down the temperature of 40 g of water at 34℃ to its
freezing temperature. The specific heat capacity of water is `4.2 J kg^-1 K^-1`. Calculate the specific latent heat of ice. State one important assumption made in the above calculation.